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P. G. BUTLER. PROCESS OP SBPARATING CREAM FROM MILK.

No. 253.155. f Patented Jan. 31,1882.

N. PETHS. Phawlimngmphu. washington n. c.

(No Model.) 2 sheets-sheet 2.

55.5131115515. f PROCESSO? SBPARATING CREAM FROM. MILK.

No. 255,155. Patented `1515.515882.

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www WW Iss NITED STATES PATENT OFFICE.

FRANCIS G. BUTLER, OF EST HARTFORD, CONNECTICUT, ASSIGNOR TO THE VERMONTFARM MACHINE COMPANY, OF BELLOVVS FALLS, VT.

lPROCESS OF SEPARATING CREAM FROM MILK.

SPECIFICATION forming part of Letters Patent No. 253,155, dated January31, 1882.

Application led November H, 1881. (No model.)

To all whom it may concern Be it known that I, FRANcIs G. BUTLER,

formerly of Bellows Falls, Vermont, but now of West Hartford, in thecounty of Hartford and State of Connecticut, have invented a certain newand useful Improvement in the Art or Method of Separating Cream fromMilk; and Ido hereby declare that the following is a full, clear, andexact description of' the invention, which will enable others skilled inthe art to which it appertains to make and use the same, reference beinghad tothe accompanying drawings, and to letters of reference markedthereon, which form a part of this specification.

My invention consists in a novel method of separating cream from themilk from which or upon which it shall have been raised by lirstascertaining the quantity or depth ot'cream raised in themilk-containing vessel, then withdrawing the milk from beneath the creamand leaving such predetermined quantity of cream within the vessel.

Figure 1 is a perspective view; Fig. 2, a vertical section, and Fig. 3details of an apparatus adapted for practicing my invention.

A represents any ordinary can, or it may be a pail or other vessel orvat for holding` milk, and near its top it is provided with a pane orpanel, B, of glass or other transparent material, and of sufficientlength vertically to show to an observer the height of the cream whichmay be raised upon the milk in the vessel.

A scale in inches and divisions ot inches may, if desired, be made uponthe vessel or glass, as shown in Fig. 1, to indicate the height ot theraised cream. The glass may be used, however, without any scale.

The object of indicating the heightor quantity of cream before it isdrawn oft' has relation to the means next to be described for afterwarddrawing it oft' either from the bottom of the vessel or, if desired,from above the milk, and in this respect it dill'ers i'rom the objectandfunction ot' the pane described in my Patent No. 194,510, and whichcould only show the height ofthe cream after all the milk had been drawnoff from beneath it.

The bottom of the vessel is preferably made slanting toward itsoutlet-orilice, as shown at c in Fig. 2, this orifice el being at thelowest the vessel has stops 7c l to limit or arrest the vibratorymovements or swinging in either direction when the stop comes in contacteither with or l, respectively. The piece I has a graduated scale, m,and the valvepiecef carries a pointer or index, n, and these serve todetermine the position or degree to which the faucet should be adjustedrelatively to the quantity of cream raised, in order to cause thedelivery through this faucet to cease when the milk shall have beendischarged, and then leave the cream in the bottom of the vessel. Theinlet-openingo of the valve-piecefis longer than its breadth, and madein the arc of a circle of which the arbor is the center, and itsposition and its length are such relatively to the stationaryoriceclthat when the faucet E is out of operative position for discharging, orwhen it is upright, the valve-inlet ois closed 5 but when in anyposition adapted for discharging the communication of o with d will beopen more or less, according to the position of the swinging tube. Thevalve-piecej`and its tube are affixed and held to place by means of ascrew, x, and appropriate washersyz, and the arbor is preferably alittle flattened at one side, as shown at z', to prevent the washer y,which has a correspondingly-shaped opening, from turning when the tubeis turned on its axis.

T is a leather or flexible packing interposed between the plate 1 andthe valve-piecef.

The operation is as follows: The vessel having been supplied Awith milkand the cream having been raised thereon, say, to the depth of fourinches, as indicated by or through the glass B, the discharge tube orpipe E is next turnedor swung upon its center or arbor h, so as to adjust its discharging-mouthp atthe same height or indication of fourinches above the average bottom line or level of the vessel.

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This movement also opens the valve, and the can or vessel will nowautomatically discharge all the milk which is below the cream and leavethe cream in the vessel, say, four inches in depth. A further turning ofthe pipe on its arbor (which should be held tight enough by its centerscrew to maintain any position to which it may be set) will permit thesubsequent discharge of any desired portion or all of the cream, andthis should be discharged into another receptacle.

The opening d into the faucet, being on the side of the bottom of thecan, prevents any commotion or whirlpool while discharging, and theline. between the cream and the milk deseends unbroken even though thefaucet be wide open.

The slanting bottom not only lets the contents out easier,but makes abetter separation of the milk from the cream than if the bottom werelevel.

The can or vessel A is shown with a raised cover, and such that thecontents of the vessel may be water-sealed when the vessel is placedsuciently deep in water; but I do not in this application make any claimto the cover, nor to a milk-setting vessel adapted for raising cream bysealing in water, having an overhanging cover and internal supports forraising the cover slightly above the vessel, as this forms thesubject-matter of an independent application heretofore filed by me inthe United States Patent Oice.

I claimrIhe within-described method of separating cream from the milkfrom or upon which it shall have been raised, which consists in firstascertaining, as set forth the quantity or depth ot' cream raised in thevessel, and then adjusting a discharge-faucet to the desired point andwithdrawing the milk from beneath the cream,

leaving such predetermined quantity of cream within the vessel. v

FRANCIS G. BUTLER.

fitnessesz CHAs. L. BUnDE'rT, L. H. GAGER.

